linux-kernel - RE: [PATCH v6 05/10] PCI: imx6: Make core reset assertion deassertion symmetric

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Message-ID:
 <AS8PR04MB8676D25A87FBF45E2B1D26628C272@AS8PR04MB8676.eurprd04.prod.outlook.com>
Date: Mon, 18 Nov 2024 02:59:59 +0000
From: Hongxing Zhu <hongxing.zhu@....com>
To: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
CC: "l.stach@...gutronix.de" <l.stach@...gutronix.de>, "bhelgaas@...gle.com"
	<bhelgaas@...gle.com>, "lpieralisi@...nel.org" <lpieralisi@...nel.org>,
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	<conor+dt@...nel.org>, "shawnguo@...nel.org" <shawnguo@...nel.org>, Frank Li
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	<imx@...ts.linux.dev>, "kernel@...gutronix.de" <kernel@...gutronix.de>,
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Subject: RE: [PATCH v6 05/10] PCI: imx6: Make core reset assertion deassertion
 symmetric

> -----Original Message-----
> From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> Sent: 2024年11月15日 14:52
> To: Hongxing Zhu <hongxing.zhu@....com>
> Cc: l.stach@...gutronix.de; bhelgaas@...gle.com; lpieralisi@...nel.org;
> kw@...ux.com; robh@...nel.org; krzk+dt@...nel.org; conor+dt@...nel.org;
> shawnguo@...nel.org; Frank Li <frank.li@....com>;
> s.hauer@...gutronix.de; festevam@...il.com; imx@...ts.linux.dev;
> kernel@...gutronix.de; linux-pci@...r.kernel.org;
> linux-arm-kernel@...ts.infradead.org; devicetree@...r.kernel.org;
> linux-kernel@...r.kernel.org
> Subject: Re: [PATCH v6 05/10] PCI: imx6: Make core reset assertion
> deassertion symmetric
> 
> On Fri, Nov 01, 2024 at 03:06:05PM +0800, Richard Zhu wrote:
> > Add apps_reset deassertion in the imx_pcie_deassert_core_reset(). Let
> > it be symmetric with imx_pcie_assert_core_reset().
> >
> > In the commit first introduced apps_reset, apps_reset is asserted in
> > imx6_pcie_assert_core_reset(), but it is de-asserted in another place,
> > in
> 
> I'd suggest rewording like below to make it easy to understand,
> 
> "PCI: imx6: Deassert apps_reset in imx_pcie_assert_core_reset()
I'm very appreciate for your rewords. Should the imx_pcie_assert_core_reset()
 be imx_pcie_deassert_core_reset()?

Best Regards
Richard Zhu
> 
> Since the apps_reset is asserted in imx_pcie_assert_core_reset(), it should be
> deasserted in imx_pcie_deassert_core_reset()."
> 
> > stead of the according symmetric function
> imx6_pcie_deassert_core_reset().
> >
> > Use this patch to fix it, and make core reset assertion deasertion
> > symmetric.
> >
> > Fixes: 9b3fe6796d7c ("PCI: imx6: Add code to support i.MX7D")
> > Signed-off-by: Richard Zhu <hongxing.zhu@....com>
> 
> With above change,
> 
> Reviewed-by: Manivannan Sadhasivam
> <manivannan.sadhasivam@...aro.org>
> 
> - Mani
> 
> > Reviewed-by: Frank Li <Frank.Li@....com>
> > ---
> >  drivers/pci/controller/dwc/pci-imx6.c | 1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff --git a/drivers/pci/controller/dwc/pci-imx6.c
> > b/drivers/pci/controller/dwc/pci-imx6.c
> > index 996333e9017d..54039d2760d5 100644
> > --- a/drivers/pci/controller/dwc/pci-imx6.c
> > +++ b/drivers/pci/controller/dwc/pci-imx6.c
> > @@ -772,6 +772,7 @@ static void imx_pcie_assert_core_reset(struct
> > imx_pcie *imx_pcie)  static int imx_pcie_deassert_core_reset(struct
> > imx_pcie *imx_pcie)  {
> >  	reset_control_deassert(imx_pcie->pciephy_reset);
> > +	reset_control_deassert(imx_pcie->apps_reset);
> >
> >  	if (imx_pcie->drvdata->core_reset)
> >  		imx_pcie->drvdata->core_reset(imx_pcie, false);
> > --
> > 2.37.1
> >
> 
> --
> மணிவண்ணன் சதாசிவம்